django-filter:将ChoiceFilter与取决于请求的选项一起使用 [英] django-filter: Using ChoiceFilter with choices dependent on request

问题描述

我正在使用django-filter，需要添加一个ChoiceFilter，其选择取决于我收到的请求.我正在阅读ChoiceFilter的文档，但上面写着:This filter matches values in its choices argument. The choices must be explicitly passed when the filter is declared on the FilterSet.

I am using django-filter and need to add a ChoiceFilter with choices dependent on the request that I receive. I am reading the docs for ChoiceFilter but it says: This filter matches values in its choices argument. The choices must be explicitly passed when the filter is declared on the FilterSet.

那么有什么方法可以在ChoiceFilter中获得依赖于请求的选择?

So is there any way to get request-dependent choices in the ChoiceFilter?

我实际上没有编写代码，但是下面是我想要的-

I haven't actually written the code but the following is what I want -

class F(FilterSet):
    status = ChoiceFilter(choices=?) #choices depend on request
    class Meta:
        model = User
        fields = ['status']

推荐答案

我一直都很努力，以至于发现了两种不同的实现方式！ (均通过覆盖__init__方法).受此问题启发的代码.

I've been looking too hard that I found two different ways of doing it! (both by overriding the __init__ method). Code inspired from this question.

class LayoutFilterView(filters.FilterSet):
    supplier = filters.ChoiceFilter(
        label=_('Supplier'), empty_label=_("All Suppliers"),)

    def __init__(self, *args, **kwargs):
        super(LayoutFilterView, self).__init__(*args, **kwargs)

        # First Method
        self.filters['supplier'].extra['choices'] = [
            (supplier.id, supplier.id) for supplier in ourSuppliers(request=self.request)
        ]

        # Second Method
        self.filters['supplier'].extra.update({
            'choices': [(supplier.id, supplier.name) for supplier in ourSuppliers(request=self.request)]
        })

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